Analysing Social Relevance of Spatial Organisation : A Case Study of Traditional Pol Houses , Ahmedabad , India

The spatial orgnisation of the domestic spaces is the manifestation of regional context. The differences in organisational quality of space reveal varied social structures. The paper aims at analysing the relationship of the prevailing social structure and the space organisation. This paper examines domestic spatial arrangements of the traditional Pol houses of Ahmedabad, India. In this paper, space syntax theory is used to examine the spatial morphology of the houses to map visibility, permeability, visual fields and movement pattern. Traditional Pol houses are distinctive in its character and generic in nature. The houses are evolved over the period of 400-500 years. After a sample of house layouts is analysed morphologically, the relationship of spatial organisation and social behavior is determined. Analysis results show that the traditional house layouts are evolved as per social conditions and offer better social interaction in present context. Hierarchy of spaces demarcates public to the private realm of the house. The flexible activity pattern makes the house more adaptable to the changing social conditions. The analysis will be valuable in the design process to safeguard the social fabric of the community.


Architecture as Social Art
Architect, Leon Battista Alberti described architecture as social art.The reflection of social changes is evident through the spaces designed so far.Societies are evolved with pattern and order in habitat.The behavior of human beings is governed by space organisation and vice-versa.The spatial organisation of dwelling units may differ from place-to-place and culture-to culture, but it is the measure of social structure.Being a unit in a structure of society, a family forms an integral component of it.The space where a human being dwells becomes the main element of the social fabric.The house is an institution, not just a structure created for a complex set of purposes.Because building a house is a cultural phenomenon, its form and organisation are greatly influenced by the cultural milieu to which it belongs.(Rapoport, 1969) Thus it is important to study the social relevance of the built forms to understand its spatial qualities.
Human societies are the complex spatial phenomenon.It occupies the region with varied resources and people.It has definite form and through this, one can realise its existence.The spatial order is one of the most striking means by which we recognize the existence of the cultural differences between one social formation and another, that is, differences in the ways in which members of those societies live out and reproduce their social existence.(Hillier & Hanson, 1984).Socio-cultural differences are evident through the house layouts of different regions.It is important to understand the social relevance of these domestic spaces to understand the evolution of society and evolution of house form.
Man-environment relationship is explored with varied perspective by many researchers.In traditional architecture, it is observed that the house layouts are evolved as a response to the user behavior and social framework.Built forms as a response to locally available resources are customarily owner or community build.Paul Oliver said that, all forms of vernacular architecture are built to meet specific needs, accommodating values, economies, and ways of life of the cultures that produce them.(Oliver, 2006) The spaces function as public, private and semi-private effectively with the provided spatial organisation.In traditional built forms, segregation is not that rigid as seen in present context, but it supports the social ethos.Analysing the relationship of spatial organisation and its social relevance in today's context would not only provide a basis for the design process, but also would aid in creating the holistic living environment.
The paper focuses on identified social variables; privacy, private territorial behavior and public territorial behavior to examine the spatial organisation of traditional Pol houses of Ahmedabad, India.In this paper, the social variables and its impact on space organisation with a particular focus on the hierarchy of spaces is presented.The aim of the paper is to study the morphological characteristics of the spatial organisation of the Pol houses that are evolved over a period of time as a response to social conditions.The paper provides the study of representing house layouts to analyse its spatial organisation along with usage and activity pattern.

Spatial Relations and the Social Behavior
House as a living space serves similar function in all cultures and geographical locations.The basic function of providing shelter and accommodating areas to perform basic activities remains same everywhere.The evolution of domestic spaces reveals that, for performing the basic functions; the variety of activity relationships and patterns are accommodated in a house.It is evident through the study that, the socio-cultural background forms the basis for the observed variety.The important thing about a house is not that it is a list of activities or rooms, but it is a pattern of space, governed by intricate conventions about spaces there are, how they are connected together and sequenced, which activities go together and which are separated out (Hanson, 1998).The main components of the house remains the same, the social variables involved in giving the pattern remains almost same in all socio-cultural frameworks.Hence layouts of house plans from the varied time frame and places can be studied on a similar basis.Societies which might vary in their type of physical configuration and degree to which the ordering of space appears as a conspicuous dimension of culture can all be compared on a similar basis (Foster, 1989).

Hypothesis
The study presented here describes the relationship of spatial organisation and social behavior.The hypothesis states that the spatial organisations of traditional built forms are evolved with the evolution of the society and social framework.

Method
The Space Syntax analysis methodology is adopted for analysing spatial organization.It is conventionally used to develop an understanding of spatial typologies and social relations implicit in various architecture or urban settings or types (Lee, 2013).The spatial analysis method is designed to identify the topology of social relationships, how people are organised in space.It is adapted from Hillier and Hanson's Gamma Analysis as described in The Social Logic of Space.It can be used to see who inhabits positions of power and who does not.It can also be used to understand the accessibility of individuals to each other and the degree of freedom in circulation between points.A Justified Graph is a diagramming technique for revealing the topology of a spatial organization.A justified graph organizes the spaces in a building in relationship to each other with the carrier at the bottom and the other spaces arranged in rows above corresponding to the number of steps in from the carrier.This methodology is adopted to study the depth of the spaces and its relationship with privacy as social variable.Many researchers have adopted this method for identifying genotypes by morphological analysis of dwelling units (Bandopadhyay & Merchant, 2006;Nilufer & Eshika, 2015).Visibility Graph Analysis (VGA) is adopted for studying the relation between visibility and permeability as vital components of the functioning of the house spatially and is experienced by their occupants.This would help in deciding the hierarchy of spaces from the public to private as reflected in sequential organisation to understand public territorial behavior.Isovists, the concept first developed by Benedikt, 1979 as a method for analysis of architectural space is presented in the paper.Depthmap creates polygon that represents the potential field of view from a certain location, called as Isovists.It measures how deep each location is to all others.Alasdair Turner; devised an Agent's model architecture to simulate natural movement patterns in buildings.The Agent model is instrumental to acquire a better understanding of the cognitive basis of natural movement and explain navigation and way finding.This would help in understanding the private territorial behaviour

Social Variables
Architecture is not a "social art" simply because buildings are important visual symbols of society, but also because, through the ways in which buildings, individually and collectively, create and order space, we are able to recognize society: that it exists and has a certain form (Hillier & Hanson, 1984).Each activity space and its ).The courtyard is the common characteristics that hold these houses together and makes them more porous.This characteristic forms a peculiarity in terms of their spatial organisation, which is very functional and linear.Characterised by wooden construction with intricately carved columns, brackets, balconies, and sloping roofs, the Pol house has evolved through generations to uphold the socio-cultural significance of the community.Its climate responsiveness is evident through the narrow and deep house form with a shorter side facing the street, an open courtyard and semi-open areas (Agarwal, 2009).The linear arrangement of the house follows a specific hierarchy of spaces from public to semi-public and private.The spaces are not labeled for their function but are multi-purpose and provide functional adaptability.The skyline of the neighborhood is characterised by flat and sloping roofs.Usually, the ridge line of the sloping roof is kept parallel to the shorter side (width) of the house.The volume on the upper level is separated by the courtyard and is connected by passages.The front volume is lower than the rear volume.The front facade has a typical composition of openings and projected balconies on the upper floors.

Spatial Organisation of Pol House Plan
The homogeneous structure of the neighborhood is achieved through compact planning and a hierarchy of spaces.At the same time, it is porous in nature because of the arrangement of open-air spaces in the form of courtyards in the otherwise dense built environment.The main elements of the plan of the traditional pol house with a courtyard are as follows (Ref.Figure 2): 1. Otla (a veranda): The otla is a transition space between the street and the house.It demarcates the extent of the house and creates the plinth for the house with steps to enter into it.It is a semi-covered space, shaded by the projections of the upper floor balcony.

Khadki/Baithak (a living space):
The khadki/baithak is the front portion of the house, and it is usually a reception space and a formal social space.It is a sitting space for guests, and many times, it is equipped with a traditional swing called a Gujarathi swing.

Chowk (a courtyard):
The khadki leads into the chowk, which is the most important element of the Pol house; it is interiorly adjacent to the khadki.It is the central open-air part of the house and holds all other spaces together; it also acts as the activity hub in a house.All the activities take place in and around the chowk.The narrow proportion of the chowk acts as an aperture in a compact layout and serves as the climate regulator of the built form.

Osri (a semi-open family space):
The osri is a small veranda near the chowk.It is a semi-open space and accommodates the spill-over activities of the chowk.On the upper floors, the space is known as the revasha.

Parsal (a family space):
The parsal is multifunctional space deep inside the house behind chowk and is considered a private space for family members.It is also used as a dining room or an extension of the kitchen.

Ordo (a bedroom):
The ordo is the inner most space of the house, deep inside from the street; essentially, it is a private space used for sleeping and storage.

Resodu (a kitchen):
The resodu is the kitchen of the house that is adjacent to the osri, chowk, or parsal and is near the traditional water-storage system known as the tanka.Domestic activities are usually extended from the resodu to the osri, chowk or parsal.

Utility areas (water closet, bathroom, wash area, storage):
The water closet is generally placed in front and is attached to the otla or khadki rather than to the private spaces in the traditional house.With the changing lifestyles of modern residents, however, it is now placed in private areas of the Pol house.
Other utility spaces, such as the wash area for washing clothes and utensils and bathing, are attached to a common wall.Storage is a narrow space attached to other activity areas and acts as a multifunctional space.

Passage:
The passage is a transition space connecting one room to another.Generally, on the ground floor, the passage is a narrow space around the chowk and is attached to activity spaces for circulation.On      The Pol house form depicts the way of life of the people as well as their social behavior and activity pattern.The linear structure of the house is the outcome of this depiction, with a sequential organisation of spaces with respect to the level of privacy.From the most public spaces towards the front side of the access road to the most private spaces deep inside the house away from the road, the Pol house plan represents the spatial characteristics that are most suited to the climate of the region.The public and the private spaces are separated by an open-air chowk, which acts as a thermal regulator for the house.The public spaces are social spaces, whereas private spaces are functional spaces.The linear organisation offers this type of separation.Here, the chowk becomes the hub of all the activities and binds the other spaces together.
The J-graph analysis shows that, the spatial orgnisation is asymmetrical with a 'tree' type graph.Two or more spaces have an indirect relationship with each other.The depth of the social domain of the Pol house is between1 to 5. The modal value of the depth of space is 3.This suggest that the spaces are more shallow and for social interaction.The otla space is at the first level of depth and forms the space for socialising and visually connects the outdoor with the indoor.It also serves as street furniture for the narrow winding lanes and provides security along with privacy to the house.The semi public space, like the khadki, is near to entrance and placed at the second level of depth.It is observed through analysis that, private areas like the ordo are place in deeper areas and need to cross all other levels to access that.
Visibility Graph Analysis and Isovists analysis suggest that, the spaces are visually well connected and determine the space pattern of spatial configuration.From the courtyard, multidirectional view fields of views suggest the low disorder in spatial configuration.Multi directional view field suggests the low clustering coefficient, thus making the space more permeable.The regular spatial configuration allows free flow of activities.As research has shown, the degree of visibility of spaces affects the way users behave in these spaces.The higher the inter-visibility, the more it generates a social interaction in the space.The higher Isovist area from the courtyard view field makes it more spacious.The deeper Isovist perimeter makes the plan more open.Low disorder of the courtyard view field makes it more accessible and visible.Agent Model analysis shows that, the semi public areas like the courtyard, the khadki and the osri, concentration of agent movement is observed.Less concentration of agent movement is observed in private areas like the ordu.The linear movement pattern shows that the sequential arrangement of spaces with private spaces at the end of the organisation.
The spatial configuration of Pol house is highly introvert, tree like configuration, with room distributed around an internal courtyard.The spaces around the courtyard are with multidirectional views such as khadki and osri whereas other spaces are highly enclosed and with deliberately restricted connectivity and visibility, like ordu and parsal.Similar spatial configuration is seen in Pol variations.The space pattern of the Pol house is strongly related to visibility and connectivity of spaces.
The spatial organisation is socially relevant as the neighbourhood represents a cohesive, homogeneous clustering of houses of the medieval period.The protection from invaders and need for secured community spaces was culminated in gated communities of this Walled City of Ahmedabad.The social interaction was highly encouraged within the community and it gets reflected through spatial configuration.Hierarchy of spaces clearly demarcates the various activity domains and at the same time, the multi functionality of spaces dictates the flexibility of use pattern and way of life.Here qualities of spatial organisation are evolved with the social and the private life style of the inhabitants.The Pol areas with Pol houses are socially integrated neighborhoods and demonstrate the holistic living environment.
Figure 3 Figure 7. J h

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Figure 8. J-Gr house Figure 12

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Figure 17.Age hous

Traditional Pol House Analysis The
language of the Pol house is analysed by studying a number of Pol houses from different Pols that are in good condition.The houses presented here are more than 150-200 years old.Pol houses are between 2 and 4 stories in height with an open-air courtyard.The densely packed houses have common walls forming the rows of the houses.The houses are deep with a narrow frontage that faces the road.The houses are 5-6 meters wide and 12-18 meters in depth(Ref.Figures 7 & 8 Areae plans of the t tic zone at lat ndia; it was fou ity is located o ounced 'pole') ch comprises m , n. d.).The w area.